Human Reproduction — NEET Zoology MCQs with answers

Human Reproduction is a Class 12 Zoology chapter in the NEET (UG) syllabus. NEET720 has 1,518 reviewed practice questions on it, each with a quick answer and a step-by-step explanation. The 8 questions below are free and fixed, so you can bookmark this page; the full chapter, plus mistake tracking and spaced revision, is in the app.

Topics covered

Male Reproductive System · Female Reproductive System · Gametogenesis · Menstrual Cycle · Fertilisation to Lactation · Applied Reproductive Physiology · Human Genetic Disorders · Rh Incompatibility · Chromosomal Disorders · Sex Determination · Non-Mendelian Inheritance · Fertilisation and early development · Fertilization · Fertilization and Early Development · Anatomy · Pregnancy and Placenta · Human Reproduction · Spermatogenesis · Oogenesis · Fertilisation and implantation · Spermiogenesis · Parturition · Lactation · Pregnancy · Male infertility · Contraception · Reproductive hormones · Female infertility · Menstrual cycle and oogenesis · Spermatogenesis regulation · Placenta and pregnancy hormones · Contraception and feedback physiology · Lactation and fertility · Male infertility diagnosis · Menstrual cycle hormone assay · Pregnancy testing · Fertility awareness · Vasectomy follow-up · Assisted reproductive technology · Gamete transport

8 free Human Reproduction practice questions with answers

Choose an answer in your head before opening it. Each explanation says why the correct option is right and, where relevant, why the tempting wrong option is wrong.

1. Question 1 · easy · Menstrual Cycle

   The cyclic changes in the ovary and uterus, along with the associated hormonal profile, that occur repeatedly throughout the reproductive period of the human female are together called the:

   • A.Ovarian cycle
   • B.Menstrual cycle
   • C.Gestational cycle
   • D.Oogenic cycle
   Show answer and explanation

   Answer: B. Menstrual cycle

   NCERT defines the menstrual cycle as the repeated cyclic changes in the ovary and uterus, together with their hormonal control, occurring throughout a woman's reproductive life.

   The menstrual cycle is essential for reproduction and includes both ovarian events (follicle growth, ovulation, corpus luteum formation) and uterine events (endometrial proliferation, secretion, and breakdown), driven by a coordinated rise and fall of FSH, LH, estrogen and progesterone. Option A is incomplete because it names only the ovarian component. Option C wrongly equates the cycle with gestation, which is the pregnancy period after fertilisation, not the recurring pre-pregnancy cycle. Option D is a fabricated term not used in NCERT terminology.

   Common mistake: Treating the menstrual cycle as synonymous with only the bleeding phase or only the ovarian cycle.

   Key point: The menstrual cycle = ovarian changes + uterine changes + hormonal profile, occurring cyclically and repeatedly.

2. Question 2 · easy · Menstrual Cycle

   In a woman with a typical, regular reproductive cycle, the menstrual cycle repeats approximately once in every:

   • A.14 days
   • B.21 days
   • C.28/29 days
   • D.40 days
   Show answer and explanation

   Answer: C. 28/29 days

   NCERT states the menstrual cycle occurs once in about every 28/29 days during the reproductive period of the female.

   The 28/29-day figure is the standard NCERT value for a typical cycle, with ovulation occurring approximately at the mid-cycle (around day 14). Option A wrongly substitutes the ovulation day for the whole cycle length. Options B and D are plausible-sounding but incorrect numeric distractors not supported by NCERT.

   Common mistake: Mixing up the cycle length (28/29 days) with the day of ovulation (day 14).

   Key point: Typical menstrual cycle length ≈ 28/29 days; ovulation occurs around day 14 (mid-cycle).

3. Question 3 · easy · Menstrual Cycle

   The first menstruation that begins at puberty in a human female is termed:

   • A.Menopause
   • B.Menarche
   • C.Ovulation
   • D.Parturition
   Show answer and explanation

   Answer: B. Menarche

   Menarche is the NCERT term for the first menstruation that occurs at puberty, marking the start of reproductive cyclicity.

   Menarche specifically denotes the first menstrual bleeding a girl experiences at puberty. Menopause (A) is the opposite event — cessation of cycles around 45-50 years. Ovulation (C) is the release of the ovum from the Graafian follicle, a mid-cycle event unrelated to the puberty milestone. Parturition (D) refers to childbirth, an entirely different process.

   Common mistake: Interchanging menarche and menopause because both terms relate to the start/end of menstrual cycling.

   Key point: Menarche = first menstruation at puberty; Menopause = permanent stoppage of menstruation (~45-50 years).

4. Question 4 · easy · Menstrual Cycle

   Menstrual cycles cease permanently at around what age in human females, an event called menopause?

   • A.25-30 years
   • B.35-40 years
   • C.45-50 years
   • D.55-60 years
   Show answer and explanation

   Answer: C. 45-50 years

   NCERT states menstrual cycles cease around 45-50 years of age; this stoppage of menstruation is called menopause.

   Menopause marks the permanent end of the reproductive cyclicity that began at menarche. The NCERT-specified age range is 45-50 years. Options A and B are too young (women in these age groups are typically still cycling), and option D overshoots the stated range.

   Common mistake: Guessing a menopause age without recalling the specific NCERT range.

   Key point: Menopause occurs around 45-50 years — permanent stoppage of the menstrual cycle.

5. Question 5 · medium · Menstrual Cycle

   The menstrual flow, resulting from the breakdown of the endometrial lining and its blood vessels, typically lasts for about how many days and is passed out through which route?

   • A.3-5 days, through the vagina
   • B.10-12 days, through the vagina
   • C.3-5 days, through the cervix into the peritoneal cavity
   • D.1 day, through the urethra
   Show answer and explanation

   Answer: A. 3-5 days, through the vagina

   The menstrual flow lasts 3-5 days and the resulting liquid mixture of blood and endometrial tissue passes out through the vagina.

   During the menstrual phase, breakdown of the endometrium and its blood vessels forms a liquid that flows out through the vagina, normally over 3-5 days. Option B exaggerates the duration. Option C wrongly redirects the flow toward the peritoneal cavity, which is not the normal exit route. Option D confuses the reproductive and urinary tracts, which are anatomically separate in females.

   Common mistake: Overestimating menstrual flow duration or confusing the vaginal and urethral exit routes.

   Key point: Menstrual flow: 3-5 days, exits via the vagina, occurs only when the released ovum is not fertilised.

6. Question 6 · medium · Menstrual Cycle

   Rupture of the Graafian follicle and release of the ovum (ovulation) is directly induced by:

   • A.A marked increase in FSH at the end of the cycle
   • B.A sudden surge in luteinising hormone (LH) around mid-cycle
   • C.A steady rise in progesterone through the follicular phase
   • D.A decline in estrogen just before mid-cycle
   Show answer and explanation

   Answer: B. A sudden surge in luteinising hormone (LH) around mid-cycle

   A marked increase in LH — the LH surge — occurs around mid-cycle and induces rupture of the Graafian follicle, causing ovulation.

   The LH surge, occurring approximately on day 14 of a standard 28-day cycle, is the direct trigger for ovulation. Option A wrongly attributes this trigger to FSH; while FSH also shows a smaller mid-cycle rise, LH is the hormone specifically responsible for follicle rupture. Option C is incorrect because progesterone rises after ovulation (luteal phase), not before it. Option D reverses the actual estrogen trend, which rises (not falls) during late follicular phase due to the growing Graafian follicle.

   Common mistake: Confusing LH and FSH roles, or assuming progesterone rather than LH triggers ovulation.

   Key point: LH surge (not FSH) at mid-cycle (~day 14) triggers rupture of the Graafian follicle and ovulation.

7. Question 7 · medium · Menstrual Cycle

   The menstrual (bleeding) phase of the cycle occurs only under which of the following conditions?

   • A.Only if the released ovum is not fertilised
   • B.Only if the released ovum is fertilised and implants successfully
   • C.In every cycle regardless of fertilisation status
   • D.Only during the first cycle after menarche
   Show answer and explanation

   Answer: A. Only if the released ovum is not fertilised

   Menstruation occurs only when the released ovum is not fertilised; if fertilisation and implantation occur, the corpus luteum persists and menstruation is suppressed.

   If the ovum released at ovulation is not fertilised, the corpus luteum degenerates, progesterone support to the endometrium withdraws, and the endometrial lining breaks down and sheds as menstrual flow. This makes menstruation a conditional, fertilisation-dependent event, not an automatic one — ruling out option C. Option B reverses the biology: successful fertilisation and implantation actually prevent menstruation (the corpus luteum is maintained, initially via LH and later hCG). Option D is false because menstruation recurs in every non-fertile cycle throughout reproductive life, not just the first one.

   Common mistake: Assuming menstruation happens automatically every cycle irrespective of whether fertilisation occurred.

   Key point: No fertilisation → corpus luteum degenerates → endometrium breaks down → menstruation begins a new cycle.

8. Question 8 · medium · Menstrual Cycle

   During the follicular/proliferative phase, which pair of simultaneous changes correctly describes what happens in the ovary and uterus respectively?

   • A.Ovary: corpus luteum secretes progesterone; Uterus: endometrium sheds
   • B.Ovary: primary follicles grow into Graafian follicles; Uterus: endometrium regenerates/proliferates by rapid mitotic division
   • C.Ovary: Graafian follicle ruptures to release the ovum; Uterus: endometrium reaches maximum secretory thickness
   • D.Ovary: follicles remain dormant; Uterus: endometrium remains static
   Show answer and explanation

   Answer: B. Ovary: primary follicles grow into Graafian follicles; Uterus: endometrium regenerates/proliferates by rapid mitotic division

   In the follicular/proliferative phase, primary follicles grow into mature Graafian follicles in the ovary while the endometrium regenerates through rapid mitotic division in the uterus, both driven by changing pituitary and ovarian hormone levels.

   This phase occurs after menstruation ends. Two parallel processes occur: ovarian follicles mature toward the Graafian stage, and the uterine endometrium, having been shed, proliferates rapidly via mitosis to rebuild its lining. Option A describes luteal/secretory and menstrual phase events, not follicular phase. Option C describes ovulation (mid-cycle) and late secretory-phase endometrial thickening, which belong to different phases. Option D is incorrect because this is an actively proliferative phase, not a dormant one.

   Common mistake: Mixing up which ovarian/uterine events belong to the follicular phase versus the luteal or menstrual phase.

   Key point: Follicular phase = follicle maturation in ovary + endometrial regeneration/proliferation in uterus, occurring together.

Questions about Human Reproduction for NEET

More Zoology chapters

← Human Health and DiseaseAll Zoology chaptersHuman Genetics →

Questions are original NEET720 compositions reviewed for correctness, syllabus fit and option quality. Counts update as the bank grows (1,518 active practice questions in this chapter today).